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VashaNatasha [74]
2 years ago
5

The distance between Polaris and Earth in

Physics
1 answer:
galben [10]2 years ago
4 0

Answer:

4.1 × 10^18 meters.

Explanation :

speed = distance ÷ time.

distance = speed × time.

time in seconds = 431 ×365 × 24 × 60 × 60

= 13,592,016,000 secs

distance = 3 × 10^8 × 13,592,016,000

= 40,776,048,000 × 10^8

= 4.1 × 10^18 meters.

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HELP PLZ
Anon25 [30]

Answer:

A = 11.77 m/s²

Explanation:

Mass of box (m) = 66kg

Force (f) = 777n

Acceleration (a) = ??

F = ma

777 = 66 · a

A = \frac{777}{66} = 11.77m/s²

5 0
3 years ago
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Which scientific phenomenon helps scientists determine the chemical composition of some stars?
ser-zykov [4K]
The correct option is DISPERSION OF LIGHT AS IT ENTERS EARTH'S ATMOSPHERE. Scientists use astronomical spectrometer to analyse the composition of the sun and the stars. Astronomical spectrometer works on the basis of dispersion of light as it enters the earth's atmosphere.
6 0
3 years ago
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if a cyclist is travelling a road due east at 12km/h and a wind is blowing from south-west at 5km/h. find the velocity of the wi
slamgirl [31]

Answer:

The velocity of wind with respect to cyclist is -15.5 \widehat{i} - 3.5 \widehat{j}.

Explanation:

speed of cyclist = 12 km/h east

speed of wind = 5 km/h south west

Write the speeds in the vector form

\overrightarrow{vc} = 12 \widehat{i}\\\\overrightarrow{vw} = - 5 (cos 45 \widehat{i} + sin 45 \widehat{j})\\\\\overrightarrow{vw} =-3.5 \widehat{i} - 3.5 \widehat{j}

The velocity of wind with respect to cyclist is

\overrightarrow{vw} =-3.5 \widehat{i} - 3.5 \widehat{j}\overrightarrow{v_(w/c)} = \overrightarrow{vw}-\overrightarrow{vc}\\\\\overrightarrow{v_(w/c)} = - 3.5 \widehat{i} - 3.5 \widehat{j}  - 12 \widehat{i}\\\\\overrightarrow{v_(w/c)} =-15.5 \widehat{i} - 3.5 \widehat{j}

7 0
3 years ago
Which temperature is lower ? -44°c -55°c​
Mice21 [21]

Answer:

-55 degrees c

Explanation:

because negative numbers work in reverse and that makes -55 actually lower.

6 0
3 years ago
Now, using your mass (in kg), and the figures for g (in the table below), you can calculate your weight on other planets.
Licemer1 [7]

Answer:

1) Weight on Mercury

F =W=mg=68.11 \times 3.61 m.s^{-2}

Explanation:

do the same to the rest and use your calculator to find the weight in N.

3 0
3 years ago
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